Method of making a toothbrush



July 24, 1 934. M. RUDOF 1,967,783

METHOD OF MAKING A TOOTHBRUSH Filed Sept. 19, 1933 Morris ffud of.

Patented July 24, 1934 UNITED STATES PATENT OFFICE 1 Claim.

This invention relates to a tooth brush and to the method ofmanufacturing same.

An object of the invention is to provide a tooth brush which is adaptedto be positioned astride of the teeth and when so positioned to presenttufts of bristles toward the inner and the outer faces of the teeth andalso toward the edges thereof, thus providing an arrangement of bristlessuch that the exposed surfaces of the teeth as well as the crevicestherebetween may be cleansed by the brush in a single operation.

Another object is to provide a method of forming the brush whereby thedesired arrangement of bristles may be readily produced.

With the foregoing objects in view together with such other objects andadvantages as may subsequently appear, the invention resides in theparts and in the combination, construction and arrangement of parts andalso in the steps and features hereinafter described and claimed andillustrated by way of example in the accompanying drawing in which:

Fig. 1 is a perspective view of the tooth brush:

Fig. 2 is a view of the brush head as seen on the line 2-2 of Fig. 1:

Fig. 3 is a view of the brush head as seen from the under side thereof:

Fig. 4 is a view in side elevation showing in full lines the manner ofinitially forming the brush head and indicating in dotted lines themanner of bending the brush head to produce the finished shape:

Fig. 5 is a plan view of the brush head shown in Fig. 4 illustrating themanner of arranging the tufts of bristles thereon:

Fig. 6 is a perspective view illustrating a modified arrangement of thehandle connection to the brush head.

Referring to the drawing more specifically A indicates generally thebrush head which is of U shape formation; it including spaced parallelside walls 7 and 8 and a connecting top Wall 9. Each of the walls 7, 8and 9 are provided with groups of tufts of bristles indicated at 10, 11and 12, respectively, which tufts project at right angles from the wallsso that the ends of the tufts 10 extend toward the ends of the tufts 11with their outer ends disposed close together, while the tufts 12 extenddownwardly from the wall 9 and terminate between rows of the tufts 10and 11 as particularly shown in Fig. 3.

By this arrangement when the brush head is placed astride the teethgroups of the tufts of bristles will be disposed with their endspresented to the inner and the outer sides of the teeth and also to theedges thereof.

The brush head A is equipped with a handle B which, as shown in Figs. 1,2 and 3, leads from the side wall 8 so as to extend at right angles tothe channel formed in the brush head. In Fig. 6 the handle is shown asextending from one end of the top wall 9 thus leading in the directionof the length of the channel in the brush head.

In forming the brush head a fiat strip C of suitable material isprovided, as shown in Figs. 4 and 5, on which is arranged the severalgroups of the tufts of bristles 10, 11 and 12, with the rows of thetufts of bristles 12 disposed in off-set relation to the rows of thetufts of bristles 10. After thus mounting the bristles on the strip Cthe latter is bent as indicated in dotted lines in Fig. 4, thusdisposing the bristles in their desired relative positions as beforedescribed. The material of which the brush head is made is such as to behard at normaltemperatures, but which may be softened by subjecting itto the action of heat and then bent to the desired shape or it may be amaterial that may be softened by subjecting it to the action of achemical and thereafter caused to harden.

I claim:

The method of forming a tooth brush consisting in mounting three groupsof tufts of bristles on a flat backing strip to project from one side 85thereof with the bristles in the intermediate group of shorter lengththan the bristles in the end groups and arranged in rows off-setrelative to the rows of bristles in the end groups, and bending saidbacking strip into U-shape form with the bends extending between theintermediate group of bristles and the end groups of bristles, saidbends being made in a direction to position the bristles to projectinwardly toward each other.

MORRIS RUDOF.

